Metal roofing
Architectural shingles
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roofing Company Across Winnetka
If you own a home in Winnetka, you know the roofs here don’t age gracefully. Most of the ranch houses between Corbin Avenue and Winnetka Avenue went up in the 1950s and 1960s, and the original wood shake and asphalt shingle roofs are now well past their service life. When you call us about a leak, a failed inspection, or a full replacement, we answer with a live person and walk you through exactly what happens next. Grant Whitlock leads our team, and every job starts the same way: a written price before any work begins, and a technician whose name and photo you get before they knock on your door. Call (341) 217-2677 for a free estimate.
Why Mercer Roofing Co Woodland Hills Is Winnetka’s Preferred Roofing Company
Winnetka homeowners call us because we treat a roof as something that protects the people under it, not just a surface to nail shingles onto. Our technicians arrive in clean, marked uniforms, present a photo ID badge at the door, and never start a job without a written price in your hand. That matters in a neighborhood where many residents are home alone during the day or have young kids and older family members to watch over. You know who is coming before they arrive, and you can verify their identity at the door.
We’re part of the Threshold Group family, founded in 2000, and each of our locations operates under the Threshold Verified standard. That means background-checked, identity-verified technicians on every visit. Dispatch and scheduling run from our Los Angeles office, and crews serve Winnetka locally. When you call (341) 217-2677, a real person answers, 24/7. Not a voicemail, not a callback form.
Our reputation in Winnetka comes from doing the unglamorous work correctly. We pull permits, pass inspections, and include a written guarantee on every repair. The 365-Day Done Right Promise covers every job: if the work isn’t right within a year, we make it right. That’s a written promise, not a slogan.
Styles & brands we work with
Roof Inspection in Winnetka
A Roof Inspection in Winnetka typically costs $250 to $450, and for older ranch homes around the 91306 ZIP, it’s the smartest money you can spend before listing a house, after a storm, or when you notice water stains on the ceiling. We walk the entire roof surface, check flashing at valleys and penetrations, inspect the decking from the attic where accessible, and document everything with photos so you can see exactly what we see. No scare tactics, just a straight report on what your roof needs and what it doesn’t.
What We Check on Winnetka’s Older Roofs
On a 1950s Winnetka ranch, we’re specifically looking for what decades of thermal cycling do to roofing materials. The hot, dry summers around the West Valley bake asphalt shingles until they crack and curl. The mild winter rains then find those cracks and work water into the underlayment. We also check for signs of multiple re-roof layers, which is common here and usually means someone put new shingles over old shakes instead of tearing off first.
When Winnetka Homeowners Schedule an Inspection
Most homeowners call us for a Roof Inspection in Winnetka in three situations: they’re buying or selling a home and need a professional assessment, their insurance company requires one, or they’ve spotted a leak and want to understand the full scope before deciding on repairs. We also recommend one after any major wind event. The inspection report we provide is plain-English, prioritized, and if you decide to move forward with repairs, the cost of the inspection is applied toward the work.
Commercial Roofing in Winnetka
Commercial Roofing in Winnetka runs a wider range than residential work, generally $8,000 to $45,000 depending on the size of the building and the system in place. The commercial properties along Sherman Way and Saticoy Street include small retail centers, offices, and industrial buildings, many with flat or low-slope roofing that has been patched repeatedly over the years. Flat roofs in this climate face intense UV exposure and standing water issues after winter rains, which accelerates membrane breakdown.
Flat Roof Systems We Service
We install, repair, and maintain the flat roofing systems common on Winnetka commercial buildings, including TPO, modified bitumen, and built-up roofing. Each has different lifespans and costs, and we walk building owners through the trade-offs before recommending one. For buildings with existing systems, we often start with a roof inspection and a condition report so you’re not guessing about replacement timing.
Minimizing Disruption to Winnetka Businesses
We understand that a commercial roof replacement affects daily operations. For restaurants, stores, and offices, we schedule around your hours where possible and keep the property secure during the job. Every commercial quote includes a written price and a clear timeline before work begins. If permit approval is required by the City of Los Angeles for your building, we handle that and schedule inspections as part of the project.
Trusted Brands We Service in Winnetka
We install and repair shingles from GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral, and we match the right product to Winnetka’s specific conditions. For reflective roofing required under Title 24, GAF’s Cool Series and CertainTeed’s Landmark Solaris lines are the ones most Winnetka homeowners choose. Atlas and Boral also make durable options for West Valley sun exposure. Because we work with these brands regularly, we can get materials quickly and handle warranty claims directly with the manufacturers. Call (341) 217-2677 and ask which shingle line fits your home and budget.
See the difference
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After
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AfterCommon Roofing Company Problems We See in Winnetka Homes
- Layered re-roofs hiding dry rot: Many Winnetka homes have two or three layers of shingles over the original wood shakes. Each layer adds weight and traps moisture, and when we tear off, we routinely find plywood decking that’s spongy or rotted.
- Failed flashing at valleys and penetrations: The intense UV and thermal cycling around the West Valley causes metal flashing to crack, lift, and pull away from roof penetrations like vents and chimneys. Small flashing failures are the source of most Winnetka roof leaks.
- Title 24 non-compliance on older re-roofs: Los Angeles County now requires cool roof compliance when a roof is replaced. Some Winnetka homeowners discovered the hard way that a re-roof done years ago without compliant materials fails inspection today and must be redone.
- Cracked and curled asphalt shingles from sun exposure: Winnetka gets hotter and sunnier than coastal areas, and asphalt shingles here degrade noticeably faster. We see 20-year shingles failing in 12 to 15 years in this specific microclimate.
Pricing for Roofing Company in Winnetka, CA
Here’s what you can expect to pay in Winnetka. A basic leak repair runs $350 to $900, a full Roof Inspection is $250 to $450, a partial re-roof of a single slope is $3,500 to $7,000, and a full residential tear-off and replacement on a typical 1,400 to 1,800 square foot ranch runs $12,000 to $22,000 depending on shingle choice and decking repairs. Metal roofing starts around $18,000 and goes up from there. The biggest wild card is decking. On a vintage Winnetka home with multiple old layers, hidden dry rot can add $1,500 to $4,000 to a job. We inspect first, write allowances into the contract, and never change the price without your written approval. Call (341) 217-2677 for a free, written estimate.
We Also Serve Cities Near Winnetka
Our crews regularly work in Canoga Park, Reseda, Tarzana, and West Hills. If you’re looking for a reliable Roofing Company in the West Valley, you’ll find the same Threshold Verified standard, written pricing, and photo-badged technicians in every neighborhood we serve. We treat every home as if it were our own, whether it’s a 1950s ranch or a newer build. For homeowners specifically in this area, we’re the Roofing Company in Winnetka that puts everything in writing.
Serving Winnetka, CA - Our Local Coverage Area
We’re based in the Winnetka area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Roofing Company in Winnetka
In most cases, yes. Title 24 requires that when a roof is replaced, the new roofing must meet cool roof reflectance standards, and the only way to properly install a compliant system on a Winnetka home with existing layers is to remove everything down to the decking first. Layering a new cool roof over old shingles doesn’t solve the underlying issues and often won’t pass inspection. We’ll confirm what your specific home needs during a Roof Inspection in Winnetka before any work is quoted. Call (341) 217-2677 to schedule one.
For a home built in the 1950s or 1960s that still has its original or second-layer roof, an annual Roof Inspection in Winnetka is the right interval. The thermal cycling and UV exposure here breaks down materials faster than in cooler coastal areas, and catching small problems early keeps a minor flashing leak from becoming a decking replacement. If your roof has been replaced in the last 10 years, every two to three years is sufficient. Call (341) 217-2677 to schedule an inspection.
The most common find is plywood decking that has rotted from decades of trapped moisture under multiple shingle layers. On a teardown near Saticoy Street, our crew pulled back three layers of old asphalt over original shakes and found two full 4×8 sheets of plywood spongy enough to push a screwdriver through. We replaced the rotted decking, installed new synthetic underlayment and drip edge, then tied the new GAF architectural shingles into the existing ridge vent, all while keeping the homeowner informed on the code-required cool roof upgrade. This is what we mean when we say Winnetka teardowns reveal what you can’t see from the ground.
Yes, for localized issues like a small leak at a valley, a lifted section of flashing, or a handful of damaged shingles, a targeted repair without a full tear-off is often the right solution. A simple repair runs $350 to $900 in Winnetka. However, if you have multiple layers already in place or your roof is near the end of its life, patching becomes a short-term fix on a long-term problem. We’ll tell you honestly which situation you’re in. Call (341) 217-2677 for a free estimate.
Commercial buildings in Winnetka typically have flat or very low-slope roofs, which use entirely different materials like TPO, modified bitumen, or built-up roofing rather than the shingles on a ranch home. Commercial jobs also involve different drainage considerations, larger surface areas, and often require coordinating around business hours. The permitting process is the same City of Los Angeles system, but the materials, crew size, and timeline differ significantly. We handle both, and we start every commercial project with a full roof inspection so you know what you’re dealing with. Call (341) 217-2677 for pricing.
Written by Grant Whitlock, Owner at Mercer Roofing Co Woodland Hills, serving Winnetka since 2000.